This 066 Grenaded........What The Hell Happened???????

[Mastermind]

OK, I know what happened......but that's a cool title huh?

Also, it really ain't that grenaded, but it's pretty fubared.

The saw is an 066 with an aluminum flywheel, it's been ported with cut squish in my "normal" configuration. It was blowing around 200 psi, and the owner says it was tuned correctly.

All parts are OEM, except a Meteor piston.

BTW, This is the first 660/066 that I've done that ended up like this.......but **** happens when you party naked.

Take a look at these first pics, and let's kick it around......what do you think caused this carnage?

 

[HuskStihl]

Looks like a rock got thru the air filter

 

[eiklj]

Bad bearings?

 

[Mastermind]

I have more pics, but let's kick this some first......

Jon.....you are incorrect.

 

[singinwoodwackr]

spark plug lost its electrode?

 

[Mastermind]

Bad bearings?

When the saw was rebuilt, all the bearings were cleaned in my ultrasonic tank, carefully inspected, and reinstalled.

 

[albert]

spark plug

 

[Mastermind]

spark plug lost its electrode?

spark plug

Nope....

 

[Trx250r180]

did you leave your wrist watch inside during surgery again ?

 

[Mastermind]

Another pics that was pretty telling to me.

 

[albert]

When the saw was rebuilt, all the bearings were cleaned in my ultrasonic tank, carefully inspected, and reinstalled.

That doesn't insure they will stay that way though.

 

[HuskStihl]

A very small rock? ...... Who are you who is so wise in the ways of science??????

 

[Mastermind]

When the saw was rebuilt, all the bearings were cleaned in my ultrasonic tank, carefully inspected, and reinstalled.

This just means the bearings were good when the saw was rebuilt ya know.

did you leave your wrist watch inside during surgery again ?

Did I? Oh ****.

 

[Trx250r180]

busted a ring

the lower one seems to be missing a piece next to the pin

 

[Scoutillac]

Detonation

 

[Mastermind]

That doesn't insure they will stay that way though.

A very astute observation.

What might cause a bearing failure after just a few tanks???????

 

[albert]

Ring pin

 

[DexterDay]

Metal shavings and thick carbon? All I see.

 

[Mastermind]

Detonation

I've yet to see detonation damage in a saw engine.

 

[HuskStihl]

Another pics that was pretty telling to me.

Stuck the scrench thru the muffler while running?
I'm done. Carry on as you were